Abstract
A NUMBER of very accurate crystal-structure determinations of ammo-acids have been reported during the past decade, and these have provided a valuable basis for theories regarding the configurations of polypeptide chains in proteins. Serine and threonine contain the grouping Cβ-OH and can presumably occur in proteins with this group esterified : the phosphoric acid ester of serine has in fact been obtained as a product of the acid hydrolysis of casein1,2. In view of this, and since, moreover, accurate dimensions for both the serine3 and threonine4 molecules are available, an examination of the crystal structure of L-serine phosphate was undertaken by us and a lengthy refinement using three-dimensional intensity data has now reached a stage at which accurate atomic co-ordinates are available.
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McCALLUM, G., ROBERTSON, J. & SIM, G. Crystal Structure of L-Serine Phosphate. Nature 184, 1863–1864 (1959). https://doi.org/10.1038/1841863a0
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DOI: https://doi.org/10.1038/1841863a0
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